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by twohundredping
Replies
7
Views
1,264

### A key observation to make is that despite the way...

A key observation to make is that despite the way the figure is drawn, the missing angle (the one on the lower left) is 90 degrees. This is because all angles of the quadrilateral must sum to be...
2. ## Thread: Fast Way to solve this remainder question

by twohundredping
Replies
4
Views
4,569

### Check out this post on the remainder rule:...

Check out this post on the remainder rule: http://www.urch.com/forums/gre-math/133792-please-help-q-3.html#post869216
Basically when we multiply two numbers a and b together and then find their...
3. ## Thread: Probability question is puzzling

by twohundredping
Replies
5
Views
869

### All we can say about the second problem is this:...

All we can say about the second problem is this:
Abby and Brian must have started with at least 5 chips a piece. If not, then even if Abby had 4 chips and lost them all then Brian could only have 8...
4. ## Thread: Graph and algebra problems

by twohundredping
Replies
13
Views
1,557

### The two ways I would do problem 2: First way. ...

The two ways I would do problem 2:

First way. This path could lead you into trouble and waste time in general but I figured it wouldn't take too long. Notice that the answer choices A and B are...
5. ## Thread: problems on average allegation and mixtures

by twohundredping
Replies
3
Views
4,435

### You probably want to post these questions in the...

You probably want to post these questions in the forum section for the math section of the general GRE. This forum is located here: GRE Math

I'll answer 1 and 3 since I don't really understand 2....
6. ## Thread: Problem 25 on math GRE

by twohundredping
Replies
8
Views
7,383

### It is important to note that the question states...

It is important to note that the question states that x and y are positive integers so you shouldn't (without proper reasoning) plug in 0 for x or y. Now because divisibility works the way it...
7. ## Thread: Power and Roots Question

by twohundredping
Replies
5
Views
1,490

### Yes that is exactly how I always think of it. A...

Yes that is exactly how I always think of it. A little note that I'm sure you are aware of though is that it is actually 4! * 2! . So if we had to arrange n people around a table such that one...

by twohundredping
Replies
2
Views
523

### The first powerprep test I took required me to...

The first powerprep test I took required me to know how many quarts were in a gallon. Actually though, I think you just needed to know that a quart was smaller than a gallon. On the actual GRE I...

by twohundredping
Replies
2
Views
1,356

### I'm pretty sure everything here is correct but I...

I'm pretty sure everything here is correct but I cannot guarantee it as I have not done normal distributions in awhile.

The area between the 15th and 30th percentiles must be the same as the area...
10. ## Thread: need help , why this questions look hard for me ??? GRE revised questions

by twohundredping
Replies
6
Views
6,536

### A decent explanation I made back in the day. Not...

A decent explanation I made back in the day. Not my best but its all I got.

http://www.urch.com/forums/gre-math/132462-salary-new-gre-question.html

It is important that you understand the...

by twohundredping
Replies
3
Views
587

2)
Way to determine maximum number of groups:
3 + 2(7) + 3 = 20. So we can have 9 groups with 2 groups of 3...

by twohundredping
Replies
3
Views
670

### Since S is not on the line PQR, PQS will always...

Since S is not on the line PQR, PQS will always be able to form a triangle. From the triangle rule, PS < PQ + QS = PQ + QR. Since Q is between P and R this reduces to PS < PQ + QR = PR.

Your...

by twohundredping
Replies
3
Views
486

### The first approach I thought of was an inequality...

The first approach I thought of was an inequality approach.
Since P lies below line l, P satisfies y < 3x - 3 which gives t < 3r - 3 which rearranges to 3r - t > 3
We can quickly determine that the...

by twohundredping
Replies
13
Views
1,865

### From the question given, I shouldn't have assumed...

From the question given, I shouldn't have assumed that this was exponential growth. I think I arbitrarily chose exponential growth just because it made the problem more interesting. You are correct...
15. ## Thread: Paperbased revised powerprep question

by twohundredping
Replies
6
Views
2,779

### The fact that you have a prime number of extra...

The fact that you have a prime number of extra outcomes is inconsequential. This is because the valid approach uses addition and the invalid approach uses multiplication. If you want to go through...
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